By Stine Jacobsen and Mia Shanley COPENHAGEN (Reuters) – Tiny Denmark, with fewer than 6 million people, supplies half the world's hearing aids, and local makers aim to advance that commanding position as baby boomers and the iPhone generation age. GN Store Nord, headquartered in Ballerup, near Copenhagen, has a product it hopes will reach that demographic – famously averse to accepting the depredations of age – by taking the stigma out of wearing an aid. The world's fourth-largest maker has collaborated with Apple Inc to develop a device packed with bluetooth-like technology that installed in the ear allows users to stream voice and music from their iPhones without the need for an intermediary device. Denmark's expertise in sound technology can be traced back to 1904, when William Demant Holding Group was founded by Hans Demant, whose wife had a hearing disability.